13723081 has 2 divisors, whose sum is σ = 13723082. Its totient is φ = 13723080.

The previous prime is 13723057. The next prime is 13723091. The reversal of 13723081 is 18032731.

13723081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8317456 + 5405625 = 2884^2 + 2325^2 .

It is a cyclic number.

It is not a de Polignac number, because 13723081 - 2¹¹ = 13721033 is a prime.

It is a super-2 number, since 2×13723081² = 376645904265122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13723091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6861540 + 6861541.

It is an arithmetic number, because the mean of its divisors is an integer number (6861541).

Almost surely, 2^13723081 is an apocalyptic number.

It is an amenable number.

13723081 is a deficient number, since it is larger than the sum of its proper divisors (1).

13723081 is an equidigital number, since it uses as much as digits as its factorization.

13723081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 13723081 is about 3704.4677080520. The cubic root of 13723081 is about 239.4145510435.

The spelling of 13723081 in words is "thirteen million, seven hundred twenty-three thousand, eighty-one".